AP Randomly Restart

I just want to share some problem on our WLAN and looking for suggestion that will help us to solve this problem. We are using ZD3000 and having about 60 AP. We always experiencing randomly restarting of AP with seconds interval. Most of our AP is 7363 model and the FW of our ZD is 9.8.2.0 build 15. It gave us a headache causing some user to raise ticket for slowness or intermittent in connection. Hoping someone would help us.

APs are rebooting due to a 'heartbeat loss' which means they lost contact with the ZD. Check your cabling. I see most of the APs are upper floor APs, could it be your cables are too long (over 80m?). What about your uplinks? Do you have any kind of broadcast storm control enabled on your switches? Finally replace the patch lead going into the ZD.

I also see some alerts related to 'excessive probe requests'. This would cause the AP to temporarily blacklist that client as a form of protection. If the issue persists, either seek-and-destroy the client or turn off protection from the WIPS section of the ZD.

Yeah, you're right.. When there is small amount of user connecting to the WLAN, the AP is not experience this problem, but when it goes to regular working schedule, that the problem existed. If the network saturation is the root cause of this problem, what is your recommended solutions? Thank you all for trying to help me.

Yeah, you're right.. When there is small amount of user connecting to the WLAN, the AP is not experience this problem, but when it goes to regular working schedule, that the problem existed. If the network saturation is the root cause of this problem, what is your recommended solutions? Thank you all for trying to help me.

An occasional 'heartbeat loss' error is normal -although not desirable- if the AP is very busy. If the AP reboots, it means that it couldn't reach the ZD/SZ for an extended period which isn't normal.

Start by running Speedflex between the ZD/SZ and the AP. Simply click on the speedo icon next to the AP in the AP list. This will do a throughput test and should run at 0% packet loss and good wired throughput. Then look at your switches - are your switchports all running at 1000/FDX or are some of them running Half Duplex? Check the error counters on the switches. In a good wired network you should see zero errors.